摘要:
An image display apparatus designed so that the observer can view the image of an image display device without the need of manually adjusting the positional relationship between the observer's eyeball and a bundle of rays from the image display device which is to be projected into the eyeball. A positional relationship detecting section (46) observes the pupil of an observer's eyeball (44) and its vicinities, and detects where a bundle of rays from an LCD (42) is being projected. If it is detected that the ray bundle is not coincident with the pupil, motors (52a and 52b) are driven to move a first support (50a) and a second support (50b), which support the LCD (42), a backlight (43), and an ocular lens (45), so that the ray bundle passes through the pupil.
摘要:
A head-mounted image display apparatus which is capable of selectively displaying images of normal and wide sizes efficiently by utilizing approximately all the pixels of a display device without the need of removing an optical system and which provides a bright image at high resolution and is easy to handle. The head-mounted image display apparatus has an image display device (2) for displaying an image, and a projection optical system for projecting the image displayed on the image display device (2) onto an observer's eye. The projection optical system includes an anamorphic optical system which is composed of an anamorphic lens (3) and a cylindrical lens (4), for example. The anamorphic optical system is rotatable about the optical axis. Accordingly, it is possible to selectively observe two images of the normal and wide sizes by rotating the anamorphic optical system about the optical axis through 90.degree. in either direction.
摘要:
Provided is a wavelength selective switch which includes: at least one input port; a dispersive portion for dispersing wavelength-multiplexed light input from the input port into wavelength-demultiplexed lights; a condenser element for condensing the wavelength-demultiplexed lights dispersed by the dispersive portion; a deflection portion having deflection elements for deflecting, for each wavelength-demultiplexed light condensed by the condenser element; at least one output port for outputting the wavelength-demultiplexed lights deflected by the deflection portion. A light-condensing position shift compensating element is disposed in an optical path between the input port and the dispersive portion or in the dispersive portion, for compensating light-condensing position shift of the wavelength-demultiplexed lights relative to the deflection element, light-condensing position shift being generated based on the arrangement of the input ports.
摘要:
A magnetic fluid detection device includes an exciting unit for generating an exciting magnetic field to excite a magnetic fluid staying in a subject, a coil for detecting a local distortion in magnetic field distribution occurring due to the magnetic fluid excited with the exciting magnetic field generated by the exciting unit, and a control unit for signal-processing an output from the coil and informing the resultant signal magnitude.
摘要:
A stereoscopic image display apparatus having right and left display elements for displaying inputted stereoscopic image signals, right and left displaying optical systems for leading images displayed on the right and left image elements, a setting information element for outputting setting information signals on stereoscopic image display, based on the stereoscopic vision information signals about the inputted imaging distance in synchronization with the stereoscopic image signals, and a control element for controlling image position displayed on the right and left image display elements to at least optical axes of the right and left display optical systems, based on the setting information signals.
摘要:
An optical angle detection apparatus includes a light source section, a sensor section disposed separately from the light source section through a space, a timing controller, and a calculation processing section. The light source section includes a plurality of LEDs and a plurality of first polarizing plates whose polarizing directions differ from each other by 45.degree. in correspondence with the LEDs. The sensor section includes a lens and a two-dimensional PSD. The timing controller sequentially and periodically turns on the plurality of LEDs. The calculation processing section calculates the angle of the light source section relative to the sensor section around an axis determined by the light source section and the inclination angles of the sensor section in two axial directions with respect to the optical axis of the light source section on the basis of an output from the two-dimensional PSD which changes in accordance with the amount of light incident from the light source section onto the sensor section and the coordinates of an incident spot.
摘要:
A liquid crystal display apparatus designed so that the viewing angle dependence is minimized without causing the displayed image to become unsharp. The liquid crystal display apparatus has a display surface (16) for displaying an image by a plurality of pixels, and a backlight (11) disposed at a side of the apparatus which is reverse to the display surface (16) to allow an approximately parallel light beam, which is approximately normal to the display surface (16), to enter each pixel of the display surface. A microlens array (20) is disposed at the viewing side of the display surface (16), and a diffusing element (21) is disposed in the vicinity of a surface conjugate with the display surface (16) which is formed by the microlens array (20).
摘要:
A metallic film can be formed on a ceramic surface with high adhesive strength by roughening the ceramic surface by (a) dissolving and removing a vitreous substance and (b) roughening a substance constituting mainly a first surface layer, followed by conventional electroless plating.
摘要:
Provided is a wavelength selective switch, which includes: an input/output unit; a dispersive portion; a condensing optical system; and the deflection portion. The input/output unit has input/output ports. The dispersive portion disperses signal light incident from the input/output ports. The condensing optical system condenses a plurality of signal light beams dispersed by the dispersive portion. The deflection portion has a plurality of deflection elements. The deflection elements deflect, along a second direction, the signal light beams condensed by the condensing optical system. In the condensing optical system, the aberration amount of the meridional component in a sagittal coma aberration remains substantially constant irrespective of an angle formed between the optical axis of the condensing optical system and a signal light beam incident on the condensing optical system from the input/output portion, at an incident position of the incident signal light beam at a certain height in the second direction.
摘要:
There is provided a small sized imaging apparatus which can measure with high accuracy a color distribution of a surface of an object, in which a light intensity distribution on a predetermined surface in a direction substantially perpendicular to an optical axis is uniform, and a change in an amount of light in a direction along the optical axis is reduced, and an illuminating unit which used in this imaging apparatus. (The imaging apparatus) Includes a light source section (210) which supplies illuminating light, a diffusing section (211) which diffuses by reflecting the illuminating light from the light source section (210), and aperture sections (212a and 212b) which allow to emerge diffused illuminating light, and the aperture sections (212a and 212b) has an aperture diameter D which allows the diffused illuminating light to emerge as a substantially parallel light.